The Sphere, an abstract sculpture by Fritz Koenig, survived the collapse but was seriously damaged, and now serves as a memorial.

Countless other works of art and valuable artifacts, found in safe deposit boxes located throughout the towers, were also destroyed.

Two other sculptures were damaged, but not destroyed by the attacks. These are Red Cube by Isamu Noguchi and Joie de Vivre by Mark di Suvero, located down the street from the World Trade Center. They were repaired and still stand today.